Long Answer: Ascorbic acid (Vitamin C) is a monoprotic weak acid…
Question Answered step-by-step Long Answer: Ascorbic acid (Vitamin C) is a monoprotic weak acid… Long Answer: Ascorbic acid (Vitamin C) is a monoprotic weak acid with a pKa of 4.17. When a 25.00mL aliquot of ascorbic acid was titrated with a 0.1536M NaOH (standardized) solution, it took 36.85mL of the titrant to reach the endpoint as identified using phenolphthalein indicator. Use this information to: a) Calculate the concentration of ascorbic acid, to the correct number of significant figures. [2 marks] b) Determine the initial pH of the solution. Present your answer to 2 decimal places, and identify any simplifications made. [3 marks] c) Determine the pH of the solution at the equivalence point. Present your answer to 2 decimal places, and identify any simplifications made. [3 marks] d) Draw the approximate titration curve for this titration, using pH (y-axis) and Volume of NaOH (mL) (x-axis). [1 mark] e) On the titration curve in c) above, identify the exact pH and Volume of NaOH Added at the half equivalence point. [1 mark] Chemistry Science Organic chemistry BIOT 153 Share QuestionEmailCopy link Comments (0)
